13220516784 has 40 divisors (see below), whose sum is σ = 34251468480. Its totient is φ = 4394133568.

The previous prime is 13220516759. The next prime is 13220516801. The reversal of 13220516784 is 48761502231.

It is a super-3 number, since 3×13220516784³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380214 + ... + 413525.

It is an arithmetic number, because the mean of its divisors is an integer number (856286712).

Almost surely, 2^13220516784 is an apocalyptic number.

It is an amenable number.

13220516784 is an abundant number, since it is smaller than the sum of its proper divisors (21030951696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220516784 is a wasteful number, since it uses less digits than its factorization.

13220516784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794097 (or 794091 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 13220516784 in words is "thirteen billion, two hundred twenty million, five hundred sixteen thousand, seven hundred eighty-four".